For machining a sheet metal punch I plan to put some taper on the face to reduce force needed. Overall size is 8 x 8 Since it's a shallow taper - about 0.1" in 4" - I am wondering if a corner radius end mill might be better than a ball end mill. And some strategy for a path that follows the outline of the shape (planning to taper the female section so as to not distort the desired interior piece although with the shallow taper it may not be a big deal which side is tapered). If I make the path centered on the die edge the scallops would be away from the edge. Seems like cutting it with a ball will be a lot of cutting near the center vs. the corner rounding that will be cutting on the tip - much more wear on the center of the cutter and smaller/deeper scallops from the ball end mill. And cutting from deepest to shallowest depth would have the cutting at the tip although I have to ramp down at some point to start the cuts. What's the best way to do this? Material is 4140PH and will be doing this with carbide end mills.